Adding supports in Bambu Studio

Supports are structures that hold up overhanging parts of your 3D model during printing. Bambu Studio lets you add them manually, automatically, or a combination of both. You can place supports by selecting the support tool, clicking on the model where you want them, and adjusting their density and type. The software also offers an auto-support feature that generates supports based on your print angle and material.

Most users start with auto-supports because they cover the common problem areas. If your model has unusual overhangs or you want finer control, you can add manual supports on top of the auto-generated ones, or remove supports you do not need.

Key Takeaways

  • Auto-support in Bambu Studio analyzes your model and creates supports automatically based on overhang angle and material type.
  • Manual supports let you click directly on the model to place individual support points where you think they are needed.
  • You can adjust support density, type (linear or tree), and remove unwanted supports before slicing.
  • Support settings change based on your nozzle temperature and material — resin requires different support angles than PLA.

Using auto-support for quick setup

The fastest way to add supports is to use Bambu Studio's auto-support feature. Open your model in the 3D view, then look for the Auto Support button in the left panel under the model tree. Click it, and the software scans your model for overhangs that need support based on the current print angle and material settings.

Auto-support respects the overhang angle threshold you set in your print profile. By default, this is usually around 45 degrees — any surface steeper than that gets flagged for support. The algorithm generates a support structure automatically, and you can see the result immediately in the 3D view. If the result looks reasonable, you can proceed to slicing. If you want to refine it, you can add or remove supports manually.

Adding manual supports by clicking

To place supports by hand, select the Support tool from the left toolbar (it looks like a pillar icon). Your cursor changes, and you can now click anywhere on the model surface where you want a support to start. Each click places a support point at that location.

Manual supports are useful when auto-support misses a spot or creates too many supports in one area. You can click on the underside of an overhang, on a thin bridge, or anywhere else that needs reinforcement. After placing a support, you can adjust its properties — height, diameter, and type — using the properties panel on the left. If you place a support in the wrong spot, right-click it and select delete, or select it and press the Delete key.

Choosing between linear and tree supports

Linear supports are straight pillars that go from the build plate to the model. They are simple, reliable, and leave a small circular mark where they touch the model. Tree supports branch like a real tree, using less material and creating smaller contact points, but they take longer to slice and can fail if the branches are too thin.

You can choose your support type in the print profile settings under Support Type. For most prints, linear supports are the safer choice. Tree supports work well if you want to minimize material waste and are willing to wait longer for the slicer to calculate the structure. You can also mix both types — use auto-support with linear supports, then add a few tree supports in tight spaces where linear ones would not fit.

Adjusting support density and coverage

Support density controls how many support lines are generated within the support structure. Higher density means more material and longer print time, but stronger support. Lower density uses less material but risks the support failing under the weight of the model.

In Bambu Studio, you adjust density in the print profile under Support Density. The default setting works for most models. If your model has large, heavy overhangs, increase the density. If you are printing a light model with small overhangs, you can lower it to save material. You can also select individual supports and adjust their properties independently — useful if one area needs reinforcement but the rest of the model does not.

Removing supports you do not need

After auto-support runs, you may see supports in places you do not want them. Select the support you want to remove by clicking it in the 3D view, then press Delete or right-click and choose Remove. You can also select multiple supports at once by holding Shift and clicking each one, then delete them all together.

Removing unnecessary supports saves material and print time. Look for supports that are holding up areas that do not actually overhang, or supports that are so thin they are unlikely to help. If you remove a support and the model fails to print, you can undo (Ctrl+Z) and try a different approach.

Support settings that change by material

Different materials need different support angles. PLA and PETG can handle steeper overhangs than flexible materials or resins. Bambu Studio includes material profiles for common filaments — when you select a material, the overhang threshold and support type adjust automatically.

If you are using a custom material or a brand not in the library, check the material data sheet for the recommended overhang angle, then adjust your print profile accordingly. You can also test by printing a small overhang test model with different angles to see what your specific material and printer can handle without supports.

Frequently Asked Questions

Do I have to use supports?

No. If your model has no overhangs or only shallow ones, you can print without supports. Overhangs under 45 degrees usually print fine without support on most materials. Anything steeper than that will likely sag or fail. You can rotate your model in Bambu Studio to change the print angle and reduce overhangs before deciding whether supports are needed.

Why does auto-support create so many supports?

Auto-support errs on the side of caution because a failed print wastes more material than extra supports do. If the result looks excessive, you can lower the support density in your print profile or manually delete supports you think are unnecessary. You can also rotate the model to a different angle so fewer surfaces overhang.

Can I preview what the print will look like with supports?

Yes. After adding supports, click the Preview button or the eye icon to see a rendered view of the model with supports attached. This shows you exactly where supports will touch the model and how much material they will use. You can go back to edit mode, adjust supports, and preview again until you are satisfied.

What happens if I do not remove supports after printing?

Supports are meant to be removed after the print finishes and cools. If you leave them on, they will be part of the final object and will look rough where they were attached. Most supports snap off by hand or with pliers. The contact point usually leaves a small mark that you can sand smooth if needed.

Can I add supports to only part of my model?

Yes. Use the manual support tool to place supports only where you need them, or use auto-support and then delete the supports you do not want. You can also select a portion of your model and run auto-support on just that section if Bambu Studio offers that option in your version.